Consolidated Statements of Equity (Parenthetical)
3 Months Ended
Mar. 31, 2015
Balance (in units/ shares) 94,536,269
Conversion of common units to common shares (in units/ shares) 158,000
Exercise of share options (in units/shares) 70,374
Share-based compensation issuance, net of redemptions (in units/shares) 162,370
Common Shares  
Shares issued to the public (in units/ shares) 890,241